This question strangely still evokes anxiety. It remains one invested with variable beliefs in cultural superiority (ie the primarcy of the Greeks), the central importance of Europeans, Asians, etc. Were black Africans involved in the creation of the early Egyptian society, certainly as its beginnings (the emergence of the two kingdoms) were in Upper Egypt, near Nubia, rather than Lower Egypt, the Delta region.
Shaw, Ian. Egypt and the Outside World. 2002. The Oxford History of Ancient Egypt.
There are a number of ways in which we can define the ancient Egyptians themselves as a distinct racial and ethnic group, but the question of their roots a nd their sense of their own identity has provoked considerable debate. Linguistically, they belonged to the Afro-Asiatic (Hamito-Semitic) family, but this is simply another way of saying that, as their geographical position implies, their language had some similarities to contemporary languages both in parts of Asia and in the Near East.
This, in some ways, is a Colonialist and Post-Colonialist debate, one that so far, although easily answered, has had no resolution. It should really not bother us. There is evidence that the early Sumerian population spoke several languages, one indeed possibly related to old Indian languages of the time. Nevertheless, Ian Shaw felt the need to include it in his lengthy academic discussion on Ancient Egyptian history.
As historians, will have to look at the facts and use them to better understand the beginnings of urban life.